Carton blank



D. LEVKOFF Dec. 29, 1953 CARTON BLANK 2 Sheets-Sheet 1 6 Filed Aug. 17.1949 INVENTOR.

Jul/id, lean/Yo By Z alto

Dec. 29, 1953 LEVKOFF 7 2,664,236

CARTON BLANK Filed Aug. 17, 1949 2 Sheets-Sheet 2 Fig.5. 2:-

4 5 INVENTOR 3 2r Wz Patented Dec. 29, 1953 UNITED STATES PATENT OFFICECARTON BLANK David Levkofi, Great Neck, N. Y.

Application August 17, 1949, Serial No. 110,770

1 Claim.

This invention relates to cartons, and particularly to those oftray-like form generally used for containing vegetables, fruits or otherarticles.

Many of the articles packed in cartons or containers of this character,such as tomatoes or other vegetables or fruits, are of substantialweight, and therefore while it is desirable to be able to producetray-like cartons of relatively light-weight cardboard, it is essentialthat the carton be reinforced or strengthened at required locations toenable it to maintain its shape during all conditions of use and protectits con tents.

One of the objects therefore, of the present invention, is to provide acarton of the character described, and composed of a single piece ofcard-board, which will be reinforced and strengthened in a mannerenabling it to maintain its shape under hard conditions of use; andwhich will be so constructed that portions of the same which areadhesively united may be gummed, folded and attached by simplified meansand with a minimum of operations.

With these and other objects to be hereinafter described in view, I havedevised the particular arrangement of parts set forth in the followingspecification and more particularly pointed out in the claim appendedhereto.

In the accompanying drawings, wherein an illustrative embodiment of theinvention is disclosed, Fig. 1 is a view of the blank from which thecarton is produced, looking at the inside face of the blank; Fig. 2 is aface View of an end portion of the blank, showing the reinforcing flapsfor the side walls folded down to reinforcing position, and the adhesiveapplied to the end panel flaps; Fig. 3 is a sectional view taken on theline 33 of Fig. 2, looking in the direction of the arrows; Fig. 4 is aview of one end portion of the blank, showing the same in its completelyglued and folded position; Fig. 5 is a vertical sectional view throughthe erected carton looking toward one of the end walls of the same; Fig.6 is a sectional view taken substantially on the line 6-6 of Fig. 5,looking in the direction of the arrows; Fig. '1 is a side elevation of aportion of the carton in a partly erected position, and Fig. 8 is asectional view in perspective, of the erected carton.

The carton made according to the present invention is preferably, butnot necessarily, produced from a single piece of card-board stock, andfrom a substantially rectangular blank I shaped as shown in Fig. 1. Theblank so formed is provided with a central portion defined by the spacedlongitudinally-extending parallel score lines 3 and 4, said centralportion comprising the bottom of the carton, as indicated at 2, the twoend panels l4 and I5, and the two retaining flaps indicated at 24.

The side walls of the carton are indicated respectively at 5 and 6. Thatshown at 5 is located between the parallel score lines 3 and 1, whilethat shown at B is defined by the score lines 4 and 8. Extendinglaterally beyond the score line 1 is a reinforcing flap 9 which, in theformation of the carton, is folded inwardly on the score line 1 andcaused to overlie the inner face of the side wall 5 to which it isadhesively secured by means of the line of adhesive H applied adjacentthe outer edge of the reinforcing flap 9 substantially as shown in Fig.1.

The side wall 6 is provided with a similar reinforcing flap indicated atH), the same being also provided with the line of adhesive l I, and isadapted to be infolded along the line 3 to extend over the inner face ofthe side wall 6 and be adhesively attached thereto. The reinforcingflaps 9 and ID. in their infolded positions, are

' shown in Fig. 3, wherein it will be noted that the same do not extendfor the full height of the side walls, but only for a portion thereofand to a sufiicient extent to lend stiffness to the side walls andprevent lateral spreading of the same under pressure imposed by thecontents of the carton.

Extending between the ends of the side walls 5 and 6 and the side edgesof the end panels I5 are the webs indicated respectively at l6 and 20.Each web includes a tongue portion, that found on the Web It beingindicated at I8, while that found on the web 20 is indicated at 23.

The webs l6 and 26 are notched respectively at H and 22 and from theapex of each notch to the junction of each side wall and end panelextends an angular score line. That provided in the web It is seen at 19while that found in web 20 is indicated at 2|.

After the blank has been stamped out of a sheet of cardboard, it is fedto a suitable gluing apparatus which produces the two lines of adhesive,shown at l I, on the inside faces of the reinforcing flaps 9 and I0.These flaps are thereupon respectively and simultaneously foldedinwardly on the score lines I and B which causes them to be adhesivelyattached to the inner faces of the side walls 5 and 6 as shown in Figs.2 and 3. Then the gluing device applies areas of glue indicated at 21 tothe end portions of the tongues I 8 and 23 on the inner faces of thesame. As

will be noted in Fig. 1, the reinforcing flaps 9 and I0, when in theirextended positions, or while the blank is in the flat, project fartherlaterally than the end portions of the flaps I8 and 23. This permitsready application of the glue lines 1 I to the flaps 9 and I without theglue contacting the ends of the tongues, the application of the gluethereto, as at 21, taking place after the reinforcing flaps 9 and [0have been inturned as previously mentioned.

After the glue areas 27 have been applied to the tongues 18 and 23, theblank is then folded on the score lines 3 and 4, and this will cause thetongues I8 and 23 at each end of the carton to be brought in overlappedrelation and become adhesively attached together.

In the drawings, and particularly in Fig. 4; thereof, the web 6 with thetongue 18 thereon was first infolded and the glue area 27 thereonbrought into contact with the end panel 14 and adhered. thereto. The web20 then came down on top of the web l5, bringing the tongue 23 on top,

of the tongue is and attaching tongue 23 to tongue 18. If desired, theglue area on one of the tongues may be omitted, and a glue area providedonly on the tongue which is outermost, this being sufficient to hold thetongues in overlapping relation as shown in Fig. 4.

This completes the gluing operation for the carton, which is then in theflattened and folded position as shown in Fig. 4. The carton is readilyerected or set-up, by suitable machinery or by hand, and this involvesthe imposition of pressure on the opposite end panels of the foldedblank, which causes the end panels to rise to vertioal position by beingupwardly folded on the transverse score lines 12 and 13. In Fig. 7 isshown one of the end panels partly folded upwardly as above described.As the end panels are moved toward a vertical position, the webs 1.6 and20 fold on the diagonal score lines [9 and 2d thus bringing the sidewalls to erect or vertical position. When the end panels reach avertical position, they are retained by means of the retaining flaps 24.These flaps are downfolded on the score lines 25 so that they extenddown into the carton and. when tucked therein, they extend over the websl6 and 2,0 and look behind the ends 25!v of the glued-down reinforcingflaps 9 and [0, thus holding the carton in its setup position, an endportion of the carton in such position being shown in Fig. 8.

By the employment of reinforcing flaps on the side walls in the mannerexplained and having the relative proportions as described with respectto the tongues 18 and 23, the glue application to '4 the flaps andtongues is facilitated; the folding down of the reinforcing flaps isreadily performed and the box or carton, when erected, is sturdy andstrong.

While I have shown one embodiment of the invention, it is obvious thatthe same is not to be restricted thereto, but is broad enough to coverall structures coming within the scope of the annexed claim.

What I claim is:

A blank for producing a tray-like carton comprising, a substantiallyflat, rectangular one-piece strip, said strip having parallel scorelines dividing it into a bottom and a pair of side walls, additionalscore lines extending longitudinally of the side walls to providereinforcing flaps for inturning and securement over the inner faces ofthe side walls, said reinforcing flaps being gummed adjacent to theirouter edges only and being of a width less than the depth of the sidewalls, an end panel at each end of the blank, diagonally foldable webslocated between the end panel and the ends of the side walls, each ofsaid webs including tongue portions extending laterally from the endpanel to an extent less than the lateral projection of the reinforcingflaps before said flaps are infolded and secured down over the sidewalls, said tongue portions ending in alignment with the innermostterminations of the gummed areas on the reinforcing flaps whereby thegumming of said areas can take place during the longitudinal movement ofsaid blank without encroachment upon the tongue portions, the tongueportions having ends which extend beyond the side walls after thereinforcing flaps are infolded whereby an adhesive can then be appliedto said ends of the tongue portions during the longitudinal movement ofsaid blank which extend beyond the reinforced side walls, and a lookingflap on the panel for extension over the tongue portions and adapted tolock behind the ends of the reinforcing flaps when the blank is erected.

DAVID LEVKOFF.

References Cited in the file of this patent UNlTED STATES PATENTS NumberName Date 1,456,248 Moyer May 22, 1923 1,720,506 Wise July 9, 19291,758,513 Gross May 13, 1930 1,886,879 Gross Nov. 8, 1932 1,935,019Comley Nov. 14, 1933 2,220,076 Carruth Nov. 5, 1940 2,220,121 RinglerNov. 5, 1940

